Brake-shoe.



No. 802,351. PATENTED OCT. 17. 1905.

' 0. F. BINGHAM.

BRAKE SHOE.

APPLIOATION FILED JUN. 2. 1905.

O MBfiM /W inventor.

4 Attornny Warren STAZFiiirtiijENi orriroie.

CHARLES F. BINGI-IAM, OF BUFFALO, NEW YORK, ASSIGNOR TO WILLIAM P. TAYLOR.

BRAKE-SHOE.

Specification of Letters Patent.

Patented Oct. 17', 1905.

Application filed June 2,1905. Serial No. 263,402.

To (I'll: who/1t it may concern.-

Be it known that I, CHARLES F. BINGHAM, a citizen of the United States. residing at Buffalo, in the county of Erie and State of New York, have invented certain new and useful Improvements in Brake-Shoes, of which the following is a specification.

This invention relates to a railway brakeshoe of that class in which the shoe is strength sued by one or more reinforcements embedded in the cast body of the shoe.

The object of the invention is to lock the reinforcement in the body against removal therefrom in a downward direction until the shoe is worn sufiiciently thin to almost entirely wear out the reinforcement. This is attained by making the sides of the reinforcement so that they taper or converge toward each other from the top downward, thereby giving the reinforcement a wedge shape in cross-section with the greater width at the top. I hen the body of the shoe is cast around the reinforcement, tapering or converging side walls corresponding to the tapering sides of the reinforcementarc formed in the socket around the reinforcement, thereby providing a dovetailed socket in which the reinforcement is wedged against downward movement. form of reinforcement is locked in the body against downward removal until the shoe is worn sufficiently thin to entirely wear out the reinforcement, or nearly so.

This invention also relates to certain details of construction. all of which will be fully and clearl y hereinafter described and claimed, reference being had to the accompanying drawings, in which a preferred adaptation of the invention is shown.

Figure 1 is a vertical longitudinal section through the improved brake-shoe on line a a, Fig. 3. Fig. Qisalongitudinal section through the improved brake-shoe cut on the curved line 7) 7), Fig. 1, concentric with the curved braking-surface of the shoe. Fig. 3 is an enlarged transverse section through the improved brake-shoe on line cc, Fig. 1. Fig. 4c is an enlarged transverse section through the brake-shoe, showing another form of reinforcement. Fig. 5 is an enlarged cross-section through one form of reinforcing-rod. Fig.

6 is an enlarged cross-section through another form of reinforclng-rod.

In referrmg to the drawings for the details This drop or be detached therefrom until the shoe is nearly worn out or is unfit for further use.

The preferred adaptation of this improved brake-shoe comprises a cast body 1 of the usual shape and two reinforcinga'ods 2. These rods are of similar construction and each having a fairly wide top face, a narrow bottom face, and two tapering sides which converge from the top to the bottom, so that the rods are approximately in the form of a keystone in cross-section. In the sectional view of the rod in Fig. 5 the top face is designated by the numeral 3, the bottom face by the numeral st, and the sides by the numeral 5 for the purpose of clearly (.listinguishing them. in the form shown in Fig. 6 the rod is of triangular shape, with one of the faces 6 constituting the horizontal top surface of the rod and the two other faces 7 and 8 the tapering sides.

The rods 2 when embedded in the cast body 1 are wedged therein until nearly worn out and cannot drop or be removed therefrom until the shoe is worn sufiicieutly thin to entirely expose them.

The top corners at the junction of the top face and the tapering sides of the reinforcing rod are sufficiently sharp to weld fairly well with the molten metal of the body even when the reinforcing-rod is placed in the mold in a cold condition.

lncasting this improved brake-shoe the reinforcing rods are placed in position in a suitable mold and the molten metal poured therein and around the reinforcing-rods. The great advantage of this construction is that the reinforcing-rod is locked in the cast body until the body is too thin for safe use, which is due to the tapering form in cross-section of the reinforcingrod and the wedging of the same inf the dovetail socket in the body, both the socket and rod constantly broadening from the bottom upward to the top, so that the rod is wedge-locked between the two side walls of the socket, which diverge gradually from each other throughout their width from the bottom of the socket upward to the top termination of the side walls.

I claim as my invention-- 1. A shoe of the class described, consisting of a cast body and a reinforcing-rod completely wedge-locked in said body.

2. In abrake-shoe, areinforcing-rod having sides tapering throughout from the top downward and a body cast around said rod.

3. In a brake-shoe, a reinforcing-rod having sides converging toward each other from the top downward and a body cast around said rod.

4. A shoe of the class described-consisting of a cast body and a reinforcingrod in said body, both the rod and socket in which it is embedded widening gradually from the bottom 

